Long Leukocyte Telomere Length Is Associated with Increased Risks of Soft Tissue Sarcoma: A Mendelian Randomization Study

Cancers
Yifan XuJian Gu

Abstract

Leukocyte telomere length (LTL) has been associated with the risks of several cancers in observational studies. Mendelian randomization (MR) studies, using genetic variants as instrumental variables, have also shown associations of genetically predicted LTL with cancer risks. In this study, we performed the first MR analysis on soft tissue sarcoma (STS) to investigate the causal relationship between LTL and the risk of STS. Genotypes from eleven LTL-associated single nucleotide polymorphisms (SNPs) in 821 STS cases and 851 cancer-free controls were aggregated into a weighted genetic risk score (GRS) to predict LTL. Multivariate logistic regression was used to assess the association of STS risk with individual SNPs and aggregated GRS. Four SNPs displayed evidence for an individual association between long LTL-conferring allele and increased STS risk: rs7675998 (odds ratio (OR) = 1.21, 95% confidence interval (CI) = 1.02-1.43), rs9420907 (OR = 1.31, 95% CI = 1.08-1.59), rs8105767 (OR = 1.18, 95% CI = 1.02-1.37), and rs412658 (OR = 1.18, 95% CI = 1.02-1.36). Moreover, longer genetically predicted LTL, calculated as GRS, was strongly associated with an increased risk of STS (OR = 1.44, 95% CI = 1.18-1.75, p < 0.001), and there was ...Continue Reading

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Methods Mentioned

BETA
PCR
hormone replacement therapy
genotyping

Software Mentioned

R
R Package
Genome Studio
STATA

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